Seat and back rest for a chair



FIG. 1 is a perspective view showing the top, left side and front of aseat and back rest for a chair which forms my new design, the brokenlines showing other parts of the chair being for illustrative purposesonly and forming no part of my design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a front elevational view thereof.

The ornamental design for a seat and back rest for a chair, as shown anddescribed.